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Physics 1987 JAMB Past Questions

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16
22,000J of heat is required to raise the temperature of 1.5kg of paraffin from 20oC to 30oC. Calculate the specific heat capacity of paraffin.
  • A. 1466Jkg-1 oC-1
  • B. 2933Jkg-1 oC-1
  • C. 4400Jkg-1 oC-1
  • D. 5866Jkg-1 oC-1
View Answer & Discuss (5) JAMB 1987
17
In which of the following are the substance arranged in descending order of their thermal conductivities?
  • A. copper, steel, glass
  • B. steel, copper, glass
  • C. steel, glass, copper
  • D. copper, glass, steel
View Answer & Discuss (3) JAMB 1987
18

The vacuum in a thermos flask helps to reduce heat transfer by?

  • A. convection and radiation
  • B. convection and conduction
  • C. conduction and radiation
  • D. radiation only
View Answer & Discuss (5) JAMB 1987
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19
Which of the following phenomena explains the fact that a house whose roof is coated with white paint will be cooler in the hot season than one coated with black paint ?
  • A. conduction
  • B. convection
  • C. refraction
  • D. reflection
View Answer & Discuss (17) JAMB 1987
20
Calculate the amount of heat required to convert 2kg of ice at 2oC to water at 0oC. [specific heat capacity of ice = 2090Jkg-1 oC-1, specific latent heat of fusion of ice = 333kJkg-1]
  • A. 666J
  • B. 8360J
  • C. 666 000J
  • D. 674 360J
View Answer & Discuss (4) JAMB 1987
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